package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.controller.admin.EmployeeController;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;

import static com.sky.constant.MessageConstant.PASSWORD_EDIT_FAILED;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;
    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        //进行md5加密，然后再进行比对
        password =DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }
        //3、返回实体对象
        return employee;
    }

    /**
     * 新增员工
     * @return
     */
    public void add(EmployeeDTO employeeDTO) {
        //1.创建一个Employee对象
        Employee employee = new Employee();
        //2.Employee对象赋值
        BeanUtils.copyProperties(employeeDTO, employee);
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
        employee.setStatus(StatusConstant.ENABLE);
//        employee.setCreateTime(LocalDateTime.now());
//        employee.setUpdateTime(LocalDateTime.now());
//        employee.setCreateUser(BaseContext.getCurrentId());
//        employee.setUpdateUser(BaseContext.getCurrentId());
        //3.调用mapper插入到数据库中
        employeeMapper.insert(employee);
    }

    /**
     *  分页查询
     */
    public PageResult page(EmployeePageQueryDTO pageQueryDTO) {
        //1开启分页
        PageHelper.startPage(pageQueryDTO.getPage(), pageQueryDTO.getPageSize());
        //2查询分页数据
         Page<Employee> result = employeeMapper.page(pageQueryDTO);
        //3封装PageResult返回
        return new PageResult(result.getTotal(),result.getResult());
    }

    /**
     * 启用禁用员工
     */
    public void startOrStop(Integer status, Long id) {
        //1.创建一个Employee对象
        Employee employee = new Employee();
        //2.Employee对象赋值
        employee.setId(id);
        employee.setStatus(status);
//        employee.setUpdateUser(BaseContext.getCurrentId());
//        employee.setUpdateTime(LocalDateTime.now());
        //3.调用mapper修改到数据库中
        employeeMapper.update(employee);
    }

    /**
     * 根据id回显员工信息
     * @return
     */
    public Employee getById(Long id) {
        return employeeMapper.getById(id);
    }


    /**
     * 修改员工
     * @return
     */
    public void update(EmployeeDTO employeeDTO) {
        //1.创建Employee对象
        Employee employee = new Employee();
        //2.Employee对象赋值
        BeanUtils.copyProperties(employeeDTO,employee);
//        employee.setUpdateTime(LocalDateTime.now());
//        employee.setUpdateUser(BaseContext.getCurrentId());
        //3.调用mapper修改到数据库中
        employeeMapper.update(employee);
    }

    /**
     * 修改密码
     * @param passwordEditDTO
     * @return
     */
    public void editPassword(PasswordEditDTO passwordEditDTO) {
        //1.根具员工id查询员工对象
        Employee employee = employeeMapper.getById(BaseContext.getCurrentId());
        //2.判断数据库中密码是否跟用户传入的原密码一致
        String password = DigestUtils.md5DigestAsHex(passwordEditDTO.getOldPassword().getBytes());
        if(!password.equals(employee.getPassword())){
            //3.不一致抛出异常
            throw new PasswordErrorException(PASSWORD_EDIT_FAILED);
        }
        //4.一致的话修改密码(加密)
        employee.setPassword(DigestUtils.md5DigestAsHex(passwordEditDTO.getNewPassword().getBytes()));
//        employee.setUpdateTime(LocalDateTime.now());
//        employee.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.update(employee);

    }

}
